I just purchased a new multi-vitamin as I've heard hypothyroidism can cause or be worsened by vitamin/mineral deficiencies. I made sure to get one that did not have iron in it as I am a carrier of hemochromatosis and don't need any more iron in my diet, so I picked one that is one daily women's 50 + (even though I'm not even 40 yet). Now that I got home I realize this one has 10 mg of soy isoflavones. If I take this with my dinner and continue taking my synthoid first thing in the morning do you think that would be OK? Or do you think I just need to find a new vitamin???
I would say find another vitamin. My experience is that it is best to steer well clear of Soy/Soya - just avoid taking anything that contains it.
(I once switched to Soya Milk - just thought I would be healthy !! ha! ha! wrong move - my Thyroid (I'm underactive and on Thyroxine) went completely mad and crashed. It was so bad that I felt as bad as I did before I was diagnosed and placed on Thyroxine. I recently by mistake purchased some vitamins and then realised that they contained soya - so took them back and got my money back.